Comment by fluidcruft

Compliling apps yourself would fall under and use the system for hobbyists Google said they are working on. At a basic level, apps you compile yourself would likely sideload over adb/USB and it's easy enough to exception adb as an install vector as distinct from app stores downloading and installing from the the network.

adb doesn't help F-Droid, but that's clearly a very different thing (at least as I see it).